Centrifugal pump



W. F. TRENARY.

. CENTRIFUGAL PUMP.

APPLlcAioN FILED nEc.3o,1918. 31942339369.

@brow @-13 Patented July 18, 1922 2 SHEETS--SHEET l.

W. F. TRENARY.

. CENTRIFUGAL PUMP. APPucATloN FILED Dec. so. 1918.

Patenteaquly 18, 1922.

2 SHEETS-SHEET 2.

I Laeaaee.

-WILLIAM F11/ANUIES TRENARY, OF ATLANTA, GEORGIA.

CENTRIFUGAL ruime.

x Application led December 30, 1918. Serial No. 269,816.

- T o all whom it may concern Be it known that l, WILLIAM FRANGIES TRENARY, a citizen of tle United States, residin at Atlanta, in the county of Fulton and tateF of Georgia, have invented a certain new and useful lImprovement in Centrifugal Pumps, of which the following is la full, clear, and exact description.

rlhis invention isin the nature of an ,improvement on the centrifugal pump of my Patent No. 984,456, granted ebruary 14,

1911, .the pump being primarily designed to supplj,7 liquid charged with solids, such as water charged with sand, or grit, lfor use in connection with gang sawsrubbing beds or the like in stone working machinery, and for other purposes; the apparatus, especially in the larger sizes, being adapted for efficient use as a dredge pump.

. lThe objectof the invention is to protect the piston shaftagainst undue abrasion and wear, and to prevent leakage on the suction v. at

side of the pump such as would causevthe pump to lose its priming.

The invention consists of/a 'stuffing box provided with a bushing that may be flushed, and that may be adjusted to the shaft to compensate for wear, and a liquidseal arranged next to the stuiiing box and adapted to'prevent leakage at that point and thereby insure the retention of the priming lafter thepump is once primed, as will proceed now to explain and finally claim.

lnA the accompanying drawings illustrat-l ing-the invention, inthe several figures of which like parts are similarly designated,

Figure 1 isvan elevation partly in section, showing' my improvements applied to a `centrifugal pump of the type represented in my patent mentioned. Fig. 2 is a cross-` section on a larger scale of the stuffing box taken on line 2-2 Iof Fig. 1. Fig. 3 is a perspective view of the bearing blocks or bushings used in the stuing box. Fig. 4

is a longitudinal sectionillustrating a modiication of the/liquid seal. Fig. 5 is a crosssection of the liquid seal taken on line 5-5 of Fig. 4.

The pump caslng'l, piston 2, shaft 3, bearings 4, 5 and 6, and the pulleys 7 may be substantially as in the patent referred to, or of any other approved character.

The stufling box 8 may be divided and its parts provided with lateral Hanges 9 suiti ably bolted together, and with end flanges Specification of Letters Patent.

Patented July is, ieee.

.ternal circumferential or peripheral grooves 16 which form in conjunction with the stuffing cation withthe after-mentioned wateresupbox a chamber which is in communiply pipe and drain pipe. The object of this chamber is to receive water for cooling and lubricating the parts, .and aid in washing out the dirt, grit, sand and other foreign matter that may have entered or may have been forced back int'o the bushing around the shaft.

The bottom of the'stufling box is provided with a number of set-screws 17 by means of which the bushing lsections may be adjusted to compensate for wear, and in order to fix the adjustment of these screws, they may be provided with lock-nuts 18.

19 is the water-supply pipe above referred to opening into the stuing box and communicating with the interior of the bushing and the chamber formed by the grooves 16 aforesaid, for introducing perfectly clean, clear water for cooling, lubricating and other purposes. ln order to remove dirt, grit, and other matter vgetting into the bushing from the interior of the'pump or otherwise, the drain-pipe 20 above referred to is introduced which is in open communication with the interior of the bushing and said chamber.

The real-,end of the stuffing box is made' With a flange 21 which forms a part of a tank- 22 adapted to receive water or other sealing agent, so as to seal or render leak-proof the gland 23 inserted about the shaft3 into the troduced'v into the stuiling box between this gland and they shaft? and this packing 1s 'stufing box. Any, suitable packing 24 is inkept well oiled by means of. any suitable o iling device 25, here shownas a compression cup. The opposite wall of ltheltank also is provided withray gland 26. The top would lose its vacuum, or would break and thus render necessary a frequent ire-priming i of the pump. The liquid tank makes a per fect seal and prevents air from passing in at this point. v

Preferably the seal is cast with the stuiling box, but it may be made separate and attached to the stuli'ng box by bolts, as indicated in Fig. 4, wherein the end of the stuifing box is made with a ange 28, and the tank is made with a flanged openl end 29 fitted to this flange 28 in any suitable liquidti ht manner.

he bottom ofthe tank is provided with a suitable draining device 30, so as to drain olf water to prevent freezing and also to evacuate sediment.

As illustrated, the parts are readily sepa.'- rable for renewals or repairs.

Variations in details of construction and to the shaft to compensate for wear on the` shaft, means to supply liquid to the shaft within the bushing, and externalcircum-4 ferential grooves on the bushing members in communication with the liquid supply means to drain the liquid and solid matter from the bushing.

2. In a centrifugal pump, the combination of :a stuiing box, bushings arranged therein and embracing a shaft, means for supplyin liquidto the stufling box, means to drain o the liquid from the stulln box, and circum ferentlal grooves in the ushings vforming stance which might get in'the bearin, a ng gland closing the outer end of the stu box, and a'liquid seal ap lied to the outside of the stuffing box an the surrounding gland and enclosing said gland, said liquid seal consisting 'of a tank arranged transyersely on the shaft and containing aliquid vand adapted to render the stufng box airtight and thereby maintain the primlng of the pump: i i

In testimony whereof I have hereunto set my hand this 24th/ day of December, A. D. 1918. 4

y WILLIAM mANclEs mamar.

- Witnesses i J. T. HALE,

OWENS JonNsoN. 

